I went from contracting Part 91 in a super midsize with a 135 background to Endeavor. The quality of life was great for me once I got some seniority, even though I took a huge pay cut.
Having a set schedule with a bit of flexibility with trip trades and drops was amazing compared to no schedule. Commuting sucked balls.
My idea was to get my time, upgrade fast, and move on. We stagnated in growth, so what I thought would be a 6 month upgrade never happened in 3.5 years. Ultimately, I was able to move on to Spirit. If anything, it was a good primer and introduction to 121 flying.
It is really nice to just go to work and fly the airplane. No coffee, ice, papers, no last minute trips, no lav cleaning. You have a team of people working with you to get the job done, etc.
Anyways, I was in a similar situation and made the jump and it worked out for me. I enjoyed my time at Endeavor.